8chan is an internet forum which critics say has been a safe haven for hate speech. EL PASO, Texas - White supremacists and neo-Nazis have found a racist's virtual paradise that authorities believe has now become home to three hate-filled rants by suspected mass shooters. That place -- the open internet forum 8chan -- is being blamed for fostering violent white supremacists in the US and other countries. 8chan is part of what Joanna Mendelson, a senior researcher with the Anti-Defamation League, calls the "lion's den of hate." It's been a public bulletin board on the open internet that's been co-opted by far-right extremists because of its commitment to allow any form of speech.

Twenty minutes before embarking on a shooting spree in El Paso, Texas, that killed at least 22 people, the suspect apparently announced his grim plans on the controversial message board 8chan. In the wake of the El Paso shooting Saturday, Brennan is calling on the site's new owners to shut it down. Once again, a terrorist used 8chan to spread his message as he knew people would save it and spread it, he told The Washington Post. The board is a receptive audience for domestic terrorists.The site has been experiencing intermittent outrages after security company Cloudflare said it would no longer provide its services protecting the message board from denial-of-service attacks. RELATED STORIESMother Reportedly Died Shielding Her Baby in El Paso ShootingTwo Mass Shootings in Less Than 24 Hours Leave at Least 29 Dead in Texas and OhioThese 2 People Survived the Garlic Festival and Las Vegas

Witnesses describe the scene as a shooter opened fire at a shopping center in El Paso, Texas. (CNN) - Saturday's shooting in El Paso is at least the third atrocity this year where a suspect is believed to have posted to 8chan in advance of an attack. Law enforcement officials in El Paso, Texas, confirmed on Saturday they were investigating a document posted on 8chan that they believe was written by Patrick Crusius, the shooting suspect. A CNN analysis found it was posted less than 20 minutes before police received the first calls about the El Paso shooting. The writer of the document linked to the El Paso suspect expressed support for the shootings of two mosques in Christchurch.